From 15b1b3f70d3dfb035d7cec73e1590d26911833c7 Mon Sep 17 00:00:00 2001
From: William Blake Galbreath <Blake.Galbreath@GMail.com>
Date: Thu, 26 Mar 2020 19:06:22 -0500
Subject: [PATCH] Configurable TPS Catchup

---
 src/main/java/net/minecraft/server/MinecraftServer.java | 7 +++++++
 src/main/java/net/pl3x/purpur/PurpurConfig.java         | 5 +++++
 2 files changed, 12 insertions(+)

diff --git a/src/main/java/net/minecraft/server/MinecraftServer.java b/src/main/java/net/minecraft/server/MinecraftServer.java
index 591b0457b4..e457909961 100644
--- a/src/main/java/net/minecraft/server/MinecraftServer.java
+++ b/src/main/java/net/minecraft/server/MinecraftServer.java
@@ -989,6 +989,13 @@ public abstract class MinecraftServer extends IAsyncTaskHandlerReentrant<TickTas
                     this.methodProfiler.exitEnter("nextTickWait");
                     this.ac = true;
                     this.ab = Math.max(SystemUtils.getMonotonicMillis() + 50L, this.nextTick);
+                    // Purpur start - tps catchup
+                    if (net.pl3x.purpur.PurpurConfig.tpsCatchup) {
+                        this.ab = Math.max(SystemUtils.getMonotonicMillis() + 50L, this.nextTick);
+                    } else {
+                        this.ab = this.nextTick = curTime / 1000000L + 50L;
+                    }
+                    // Purpur end - tps catchup
                     this.sleepForTick();
                     this.methodProfiler.exit();
                     this.methodProfiler.b();
diff --git a/src/main/java/net/pl3x/purpur/PurpurConfig.java b/src/main/java/net/pl3x/purpur/PurpurConfig.java
index a729e7d204..7bea362132 100644
--- a/src/main/java/net/pl3x/purpur/PurpurConfig.java
+++ b/src/main/java/net/pl3x/purpur/PurpurConfig.java
@@ -155,6 +155,11 @@ public class PurpurConfig {
         useUPnP = getBoolean("settings.upnp-port-forwarding", useUPnP);
     }
 
+    public static boolean tpsCatchup = true;
+    private static void tpsCatchup() {
+        tpsCatchup = getBoolean("settings.tps-catchup", tpsCatchup);
+    }
+
     public static boolean dontSendUselessEntityPackets = false;
     private static void dontSendUselessEntityPackets() {
         dontSendUselessEntityPackets = getBoolean("settings.dont-send-useless-entity-packets", dontSendUselessEntityPackets);
-- 
2.26.2